<!-- 伪类选择器设置鼠标悬停状态 -->

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>伪类选择器</title>
    <style>
        /* 任何标签都可以设置鼠标悬停状态 */
        a:hover {
            color:red;
        }

        /* div:hover */
        /* 给类选择器设置鼠标悬停状态 */
        .box:hover {
            color: green;
        }
    </style>
</head>
<body>
    <a href="#">a标签，超链接</a>
    <div class="box">div标签</div>
</body>
</html>